Duralumin facts for kids
Duralumin is an alloy made up of 90% aluminum, 4% copper, 0.5–1% magnesium, and less than 1% manganese. It is an extremely hard alloy that is used, for example, in vehicle armour in the defense industry.
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fr:Alliages d'aluminium pour corroyage#Série 2000 (aluminium cuivre)
Duralumin Facts for Kids. Kiddle Encyclopedia.